| ADEME | Agence de l'Environnement et de la Maîtrise de l'Énergie | In French | → Organizations and associations → Nature and society → Energy economics |
| AEP | Adduction d'Eau Potable | In French | |
| AERDHA | Association d'Entraide pour la Réhabilitation de l'Habitat et le développement de l'assainissement | In French | → Organizations and associations → Accommodation |
| AIVC | Air Infiltration and Ventilation Centre | In English | → Building |
| AMCOW | African Ministerial Conference on Water | In English | → Organizations and associations → Hydrology |
| AMCOW | African Ministers' Council on Water | In English | → Organizations and associations → Hydrology |
| AMEDEUS | Accelerate Membrane Development for Urban Sewage Purification | In English | |
| ANEMONE | Analyse Environnementale et MOdélisation Numérique de l’Éolien | In French | → Energy economics |
| ANGED | Agence Nationale de Gestion des Déchets | In French | |
| ANRED | Agence Nationale pour la Récupération et l'Élimination des Déchets | In French | |
| AQA | Agence pour la Qualité de l'Air | In French | → Nature |
| ARN | Auto Recycling Nederland (www.arn.nl) | In Dutch | → Automobile manufacturing |
| ASEW | Arbeitsgemeinschaft für sparsame Energie- und Wasserverwendung im VKU | In German | → Associations → Energy economics |
| AWF | African Water Facility (www.africanwaterfacility.org) | In English | |
| AWIS | African Water Information (and Documentation) System = SADIEau | Système Africain de Documentation et d'Information sur l'Eau | In French |
In English | → Knowledge management → Hydrology → 626 |
| BANEDA | BÂtiment National Destiné à l’Entreposage des Déchets Activés | In French | → Nuclear technology |
| BASIAS | Base des Anciens Sites Industriels et Activités de Service | In French | → Nature and society |
| BioTreaT | Biological Treatment and Recycling Technologies | In English | → 50406 |
| CAMR | Clean Air Mercury Rule | In English | |
| CEFIGRE | Centre de Formation Internationale à la Gestion des Ressources en Eau | In French | → 6281 |
| CFME | Centre de Formation aux Métiers de l'Environnement | In French | → Education → Environment, environmental sciences |
| CFTE | Centre de Formation aux Techniques de l'Eau | In French | → Specialized or (poly)technical colleges |
| CGC | Compagnie Générale de Chauffe | In French | |
| CGE | Compagnie Générale des Eaux | In French | |
| CIDEN | Centre d’Ingénierie Déconstruction et ENvironnement | In French | |
| CIPP | Cured-In-Place Piping | In English | |
| CNFME | Centre National de Formation aux Métiers de l'Eau | In French | → Hydrology |
| CNRI | Comitetul National Român de Iluminat | In Romanian | |
| CoRWM | Committee on Radioactive Waste Management (www.corwm.org.uk) | In English | → Organizations and associations → Nuclear technology |
| CRNS | Community Recycling Network for Scotland | In English | → Nature |
| CWSU | Condensate Water Servicing Unit | In English | |
| DCTIM | Direction Centrale des Travaux Immobiliers Maritimes | In French | → Building |
| DEEE | Déchets des équipements électriques et électroniques = WEEE | Waste Electrical and Electronic Equipment | In English |
In French | → Electrical engineering → Electronics |
| DIS | Déchets Industriels Spéciaux | In French | → Nature |
| DVGW | Deutsche Vereinigung des Gas- und Wasserfaches (www.dvgw.de) | In German | → Organizations and associations → Energy economics |
| DWR | Dienst Waterbeheer en Riolering | In Dutch | |
| ECSR | Environmental Coordination Services & Recycling | In English | |
| EEPSEA | Economy and Environment Program for Southeast Asia | In English | → Economics |
| ELC | European Lighting Council | In English | → Organizations and associations → Electrical engineering |
| ELORA | Ermittlung des lokalen Radonpotentials | In German | → Building |
| EMWIS | Euro-Mediterranean Water Information System | In English | → Hydrology → 626 → 627 |
| ENAC | Environnement Naturel Architectural et Construit | In French | → Nature and society → Regional planning |
| EP | Éclairage Public | In French | → Electrical engineering |
| ERPA | Emission Reduction Purchase Agreement | In English | |
| ERU | Emission Reduction Unit | In English | |
| EUWI | European Water Initiative | In English | → Hydrology → 626 |
| EWA | European Water Association | In English | → Associations → Hydrology |
| EWG | Einwohnergleichwert | In German | |
| FMA | (Déchets de) Faible et Moyenne Activité | In French | → Nuclear technology |
| FNDAE | Fonds National de Développement et des Adductions d'Eau | In French | → Finance |
| FÖRE | Förderung der ökologischen Reinigungseffizienz | In German | |
| FTI | Förpacknings- och Tidningsinsamlingen | In Swedish | |
| FWWM | Food, Water, and Waste Management | In English | → Food technology |
| FWWMS | Food, Water, and Waste Management Subsystem | In English | → Food technology |
| HLLW | High Level Liquid Waste | In English | |
| HQE | Haute Qualité Environnementale | In French | → Quality management → Nature and society |
| IAHR | International Association of Hydraulic Engineering and Research | In English | → Associations |
| IAHS | International Association of Hydraulical Sciences | In English | → Associations |
| ICID | International Commission on Irrigation and Drainage | In English | → Organizations and associations → Agricultural sciences |
| IDsW | InformatieDesk standaarden Water | In Dutch | |
| IET | International Emissions Trading | In English | |
| IFFI | Institut Français du Froid Industriel et du génie climatique | In French | → Energy economics |
| IIN | Italian Institute of Navigation = IIN | Istituto Italiano di Navigazione | In Italian |
In English | → Vehicle engineering |
| ILLW | Intermediate and Low Level Waste | In English | → Nuclear technology |
| IME | Institut Méditerranéen de l'Eau | In French | → Hydrology |
| IWA | International Water Association | In English | → Associations → Hydrology |
| IWFS | Integrated Waste Fluid System | In English | |
| IWRM | Integrated Water (and) Resources Management | In English | → Hydrology → 626 → 627 |
| IWS | Integrated Water System | In English | |
| KERP | Kompetenzzentrums für Elektro(nik)altgeräte-Recycling und nachhaltige Produktentwicklung | In German | → Electronics |
| KVWN | Koninklijke Vereniging voor Waterleidingbelangen in Nederland | In Dutch | |
| LAEPSI | Laboratoire d'Analyse Environnementale des Procédés et des Systèmes Industriels | In French | → Research institutes → Nature |
| LIF | Lighting Industry Federation | In English | → Organizations and associations |
| LOI | Light Overseas Investments Limited | In English | → Electrical engineering |
| MEDRC | Middle East Desalination Research Center (www.medrc.org) | In English | → Research institutes → Chemical technology |
| MIOM | Mâchefer d'Incinération d'Ordures Ménagères | In French | |
| MSW | Municipal Solid Waste | In English | |
| NCG | Nederlandse Commissie voor Geodesie | In Dutch | → Organizations and associations |
| NCPC | National Cleaner Production Centre | In English | |
| NWP | Netherlands Water Partnership | In English | → Organizations and associations → Hydrology |
| ODE | Observatoire Départemental de l'Eau | In French | → Regional administration → Hydrology |
| OIEau | Office International de l'Eau | In French | → Organizations and associations → Hydrology |
| ONEP | Office National de l'Eau Potable | In French | → Organizations and associations |
| PDDA | Power Driven Decontamination Apparatus | In English | |
| PiReM | Pipe Rehabilitation Management | In English | |
| POLDEN | Pollution, Déchets, Environnement | In French | → Nature |
| PREDIS | Plan Régional d'Élimination des Déchets Industriels Spéciaux | In French | → Nature |
| PRTR | Pollutant Release and Transfer Register | In English | → Nature and society |
| PSS | Procédé de Stabilisation et Solidification | In French | |
| REFIDI | Résidus d'Épuration des Fumées d'Incinérateur de Déchets Industriels | In French | |
| REFIOM | Résidu de Fumée d'Incinération d'Ordures Ménagères | In French | |
| REG | Régie des Eaux de Grenoble | In French | |
| RITEAU | Réseau 'Eau et Technologies de l'environnement' | In French | → Nature |
| RNDE | Réseau National des Données sur l'Eau | In French | → Organizations and associations → Hydrology |
| RPDE | Réseau Partenarial des Données sur l'Eau | In French | → Organizations and associations → Hydrology |
| SADIEau | Système Africain de Documentation et d'Information sur l'Eau = AWIS (look above) |
In French | → Knowledge management → Hydrology → 626 |
| SANDRE | Service d'Administration Nationale des Données et Référentiels sur l'Eau | In French | → Central administration → Hydrology → 627 |
| SARAH | Sanierung radonbelasteter Häuser | In German | → Building |
| SDAGE | Schéma Directeur d'Aménagement et de Gestion des Eaux | In French | → Hydrology |
| SEACAM | Secretariat for Eastern African Coastal Area Management | In English | → International relations → Nature and society |
| SGP-RE | Salinity Gradient Power by Reverse Electrodialysis | In English | |
| SIARV | Syndicat Intercommunal pour l'Assainissement de la Région de Villeneuve-Saint-Georges | In French | |
| SICTOM | Syndicat Intercommunal de Collecte et Traitement des Ordures Ménagères | In French | → Nature |
| SIE | Système d'Information sur l'Eau | In French | → Knowledge management → Hydrology → 627 |
| SLSSS | Spacelab Subsystem Segment | In English | → 62878 |
| SOCODEI | Société pour le Conditionnement des Déchets et Effluents Industriels | In French | |
| STEP | Solving the E-waste Problem | In English | → Electronics |
| STEP | Station d'Épuration | In French | |
| STOWA | Stichting Toepast Onderzoek Waterbeheer | In Dutch | → Foundations → Hydrology |
| SWDU | Seawater Desalination Unit | In English | |
| TDM | TrashDesignManufaktur | In German | → Graphic arts |
| TIRU | Traitement Industriel des Résidus Urbains | In French | |
| TZW | Technologiezentrum Wasser (www.tzw.de) | In German | → Research institutes |
| UCD | Urine Collection Device | In English | |
| UCTA | Urine Collection Transfer Assembly | In English | |
| UEA | United Energy Associates | In English | → Energy economics → Electrical engineering |
| UIOM | Usine d'Incinération des Ordures Ménagères | In French | |
| URA | Urine Receptacle Assembly | In English | |
| WCS | Waste Collection System | In English | |
| WCS | Waste Collector System | In English | |
| WEEE | Waste Electrical and Electronic Equipment = DEEE (look above) |
In English | → Electrical engineering → Electronics |
| WFD | Water Framework Directive | In English | → 626 |
| WIS | Water Information System | In English | → Hydrology |
| WM | Waste Management | In English | |
| WMC | Waste Management Compartment | In English | |
| WMS | Waste Management System | In English | |
| WRAP | Waste & Ressources Action Programme | In English | |
| WRAP | Waste and Resources Action Programme | In English | |
| WRD | Water Resource Database | In English | → Libraries → Hydrology → 627 |
| WRI | Water Research Institute | In English | → Hydrology → 627 |
| WSCU | Water Sector Co-ordination Unit | In English | |
| WSEA | Water and Sewer Expansion Authority | In English | |
| WSSTP | Water Supply and Sanitation Technology Platform (www.wsstp.org) | In English | → Organizations and associations |
| WSU | Water Servicing Unit | In English | |
| WW | Water Waste | In English | |
| WWF | World Water Forum | In English | → Hydrology → 626 |
| WWMS | Water Waste Management System | In English |